File:
[LON-CAPA] /
loncom /
publisher /
londiff.pm
Revision
1.38:
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Sun May 7 13:26:40 2017 UTC (7 years, 9 months ago) by
raeburn
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MAIN
CVS tags:
version_2_12_X,
version_2_11_X,
version_2_11_6_msu,
version_2_11_6,
version_2_11_5_msu,
version_2_11_5,
version_2_11_4_uiuc,
version_2_11_4_msu,
version_2_11_4,
version_2_11_3_uiuc,
version_2_11_3_msu,
version_2_11_3,
version_2_11_2_uiuc,
version_2_11_2_msu,
version_2_11_2_educog,
version_2_11_2,
HEAD
- Diffs of resources in a course visible to users with view-only access
to Course Editor.
1: # The LearningOnline Network with CAPA
2: # Handler to show differences between file versions
3: #
4: # $Id: londiff.pm,v 1.38 2017/05/07 13:26:40 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30:
31:
32:
33: package Apache::londiff;
34:
35: use strict;
36: use Apache::File;
37: use File::Copy;
38: use File::Compare;
39: use Algorithm::Diff qw(diff);
40: use Apache::Constants qw(:common :http :methods);
41: use Apache::lonnet;
42: use Apache::loncommon();
43: use Apache::lonretrieve();
44: use Apache::lonlocal;
45: use LONCAPA();
46:
47: sub get_split_file {
48: my ($fn,$style)=@_;
49: my $f1;
50: my @f1;
51: if ($style eq 'local') {
52: if (-e $fn) {
53: my $fh=Apache::File->new($fn);
54: my $line;
55: while($line=<$fh>) {
56: $f1.=$line;
57: }
58: }
59: } elsif ($style eq 'remote') {
60: $f1=&Apache::lonnet::getfile($fn);
61: }
62: @f1=split(/\r\n|\r|\n/,$f1);
63: return @f1;
64: }
65:
66: sub are_different_files {
67: my ($fileone,$filetwo)=@_;
68: return &compare($fileone,$filetwo);
69: }
70:
71: sub handler {
72:
73: my $r=shift;
74: # Get query string for limited number of parameters
75:
76: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
77: ['filename','versiontwo',
78: 'versionone','filetwo']);
79:
80: # Check permissions
81: my $allowed=0;
82: my $cuname=$env{'user.name'};
83: my $cudom=$env{'user.domain'};
84:
85: if ($env{'form.filename'}=~ m{^/res/}) {
86: if (&Apache::lonnet::allowed('bre',$env{'form.filename'})) {
87: if ($env{'request.course.id'}) {
88: if ((&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) ||
89: (&Apache::lonnet::allowed('cev',$env{'request.course.id'}))) {
90: $allowed = 1;
91: }
92: } else {
93: $allowed = 1;
94: }
95: } elsif (&Apache::lonnet::allowed('bro',$env{'form.filename'})) {
96: $allowed = 1;
97: }
98: if ($allowed) {
99: ($cudom,$cuname,$env{'form.filename'})=
100: ($env{'form.filename'}=~m{^/res/($LONCAPA::domain_re)/($LONCAPA::username_re)(/.*)$});
101:
102: if (($env{'form.versionone'} eq 'priv') || ($env{'form.versiontwo'} eq 'priv')) {
103: my ($cstrname,$cstrdom) =
104: &Apache::lonnet::constructaccess("/priv/$cudom/$cuname".$env{'form.filename'});
105: unless (($cstrname eq $cuname) && ($cstrdom eq $cudom)) {
106: $allowed = 0;
107: }
108: }
109: }
110: } else {
111: ($cuname,$cudom)=
112: &Apache::lonnet::constructaccess($env{'form.filename'});
113: if ($cuname ne '' && $cudom ne '') {
114: $allowed = 1;
115: } else {
116: $r->log_reason($env{'user.name'}.':'.$env{'user.domain'}.
117: ' trying to get diffs file '.$env{'form.filename'}.
118: ' - not authorized',
119: $r->filename);
120: }
121: }
122: unless ($allowed) {
123: return HTTP_NOT_ACCEPTABLE;
124: }
125:
126: # Get the files
127:
128: my $efn=$env{'form.filename'};
129: $efn=~s{^/priv/$LONCAPA::domain_re/$LONCAPA::username_re}{};
130:
131: my @f1=();
132: my @f2=();
133:
134: &Apache::loncommon::content_type($r,'text/html');
135: $r->send_http_header;
136:
137: $r->print(&Apache::loncommon::start_page('Resource Differences',undef,
138: {'no_nav_bar' => 1, }));
139:
140: $r->print(($env{'form.filetwo'}?'':&mt('Compare versions of')).
141: ' <span class="LC_filename">'.$efn.'</span>');
142:
143: if (($cuname ne $env{'user.name'}) || ($cudom ne $env{'user.domain'})) {
144: my $nameshown = &Apache::loncommon::plainname($cuname,$cudom).
145: ' ('.$cuname.':'.$cudom.')';
146: $r->print('<p><span class="LC_info">');
147: if ($env{'request.role'} =~ /^ca\./) {
148: $r->print(&mt('Co-Author in Authoring Space for: [_1]',$nameshown));
149: } elsif ($env{'request.role'} =~ /^aa\./) {
150: $r->print(&mt('Assistant Author in Authoring Space for: [_1]',$nameshown));
151: } else {
152: $r->print(&mt('Resource Author is: [_1]',$nameshown));
153: }
154: $r->print('</span></p>');
155: }
156:
157: if (&Apache::loncommon::fileembstyle(($efn=~/\.(\w+)$/)) eq 'ssi'
158: || $efn =~ /\.meta$/) {
159: $r->print('<p><span class="LC_diff_removed">');
160: if ($env{'form.versionone'} eq 'priv') {
161: my $fn=$r->dir_config('lonDocRoot')."/priv/$cudom/$cuname".$efn;
162: @f1=&get_split_file($fn,'local');
163: $r->print('<b>'.&mt('Authoring Space Version').'</b>');
164: } else {
165: my $fn=$r->dir_config('lonDocRoot')."/res/$cudom/$cuname";
166: if ($env{'form.versionone'}) {
167: my ($main,$suffix,$is_meta)=
168: &Apache::lonretrieve::get_file_info($efn);
169:
170: $fn.=($efn =~m|(.*/)[^/]+|)[0];
171: # add on to $fn the path information in $efn
172: $fn.=$main.'.'.$env{'form.versionone'}.'.'.$suffix;
173: $r->print('<b>'.&mt('Version').' '.$env{'form.versionone'}.'</b>');
174: } else {
175: $fn.=$efn;
176: $r->print('<b>'.&mt('Current Version').'</b>');
177: }
178: @f1=&get_split_file($fn,'remote');
179: }
180:
181: $r->print('</span><br />'.&mt('versus').'<br /><span class="LC_diff_added">');
182:
183: if ($env{'form.filetwo'}) {
184: my $efn2=$env{'form.filetwo'};
185: $efn2=~s{^/priv/$LONCAPA::domain_re/$LONCAPA::username_re}{};
186: my $fn=$r->dir_config('lonDocRoot')."/priv/$cudom/$cuname".$efn2;
187: @f2=&get_split_file($fn,'local');
188: $r->print('<tt>'.$efn2.'</tt>');
189: } elsif ($env{'form.versiontwo'} eq 'priv') {
190: my $fn=$r->dir_config('lonDocRoot')."/priv/$cudom/$cuname".$efn;
191: @f2=&get_split_file($fn,'local');
192: $r->print('<b>'.&mt('Authoring Space Version').'</b>');
193: } else {
194: my $fn=$r->dir_config('lonDocRoot')."/res/$cudom/$cuname/";
195: if ($env{'form.versiontwo'}) {
196: my ($main,$suffix,$is_meta)=
197: &Apache::lonretrieve::get_file_info($efn);
198: # add on to $fn the path information in $efn
199: $fn.=($efn =~m|(.*/)[^/]+|)[0];
200: $fn.=$main.'.'.$env{'form.versiontwo'}.'.'.$suffix;
201: $r->print('<b>'.&mt('Version').' '.$env{'form.versiontwo'}.'</b>');
202: } else {
203: $fn.=$efn;
204: $r->print('<b>'.&mt('Current Version').'</b>');
205: }
206: @f2=&get_split_file($fn,'remote');
207: }
208: $r->print('</span></p>');
209: # Run diff
210:
211: my $diffs = diff(\@f1, \@f2);
212:
213: if (@$diffs) {
214: # Start page output
215: my $chunk;
216: my $line;
217: $r->print('<pre>');
218: foreach $chunk (@$diffs) {
219: foreach $line (@$chunk) {
220: my ($sign, $lineno, $text) = @$line;
221: $text=&HTML::Entities::encode($text,'<>&"');
222: $lineno=substr($lineno.' ',0,7);
223: $r->print('<span class="'.(($sign eq '+')?'LC_diff_added'
224: :'LC_diff_removed').'">'.
225: $sign.' '.$lineno.' '.$text."</span>\n");
226: }
227: $r->print("</pre><hr /><pre>\n");
228: }
229: $r->print('</pre>');
230: } else {
231: $r->print('<p class="LC_info">'.&mt('No differences found').'</p>');
232: }
233: } else {
234: $r->print('<h1><span class="LC_warning">'.&mt('Binary File').'</span></h1>');
235: }
236: $r->print(&Apache::loncommon::end_page());
237: return OK;
238: }
239:
240:
241: 1;
242: __END__
243:
244:
245: =pod
246:
247: =head1 NAME
248:
249: Apache::londiff
250:
251: =head1 SYNOPSIS
252:
253: Handler to show difference between two files.
254:
255: This is part of the LearningOnline Network with CAPA project
256: described at http://www.lon-capa.org.
257:
258: =head1 Subroutines
259:
260: =over
261:
262: =item get_split_file()
263:
264: =item are_different_files()
265:
266: =item handler()
267:
268: =cut
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